Uranium series ages of corals from the upper Pleistocene Mulege terrace, Baja California Sur, Mexico

Specimens of Porites californica</em> contained in the sediments of upper Pleistocene, +12-m marine terrace deposits developed on the east coast of the Baja California (Mexico) peninsula at Mulege have yielded ²³⁰Th/²³⁴U dates of ¹²⁴ ±5 and 144 ±7 ka (±1σ). These dates can be assigned to the well-documented late Pleistocene oxygen-isotope stage 5e high sea stand. Differences between the eustatic and present elevations of this terrace indicate average uplift rates since terrace formation of approximately 4 to 5 cm/1000 yr, indicating a relative stability and lack of major vertical deformation since the late Pleistocene. This terrace in the Mulege area can now be correlated with other marine terraces throughout the Baja California peninsula and southern California.